On this page:
exit: exiting?
exit: set-exiting
exit: insert-on-callback
exit: insert-can?-callback
exit: can-exit?
exit: on-exit
exit: exit
exit: user-oks-exit

12 Exit

Returns #t to indicate that an exit operation is taking place. Does not indicate that the app will actually exit, since the user may cancel the exit.

(exit:set-exiting exiting?)  void?
  exiting? : boolean?
Sets a flag that affects the result of exit:exiting?.
(exit:insert-on-callback callback)  (-> void?)
  callback : (-> void?)
Adds a callback to be called when exiting. This callback must not fail. If a callback should stop an exit from happening, use exit:insert-can?-callback.
(exit:insert-can?-callback callback)  (-> void?)
  callback : (-> boolean?)
Use this function to add a callback that determines if an attempted exit can proceed. This callback should not clean up any state, since another callback may veto the exit. Use exit:insert-on-callback for callbacks that clean up state.
Calls the “can-callbacks” and returns their results. See exit:insert-can?-callback for more information.
Calls the “on-callbacks”. See exit:insert-on-callback for more information.
(exit:exit)  any
exit:exit performs four actions:
Opens a dialog that queries the user about exiting. Returns the user’s decision.